16 Channel I2C Interface Electromagnetic Relay Module for Arduino Raspberry esp32 3.3V 5.0V Maximum Current per Relay – 10A Peak On Board LED Indicator with PCF8575 chip SCL, SDA Pins

Board comes fully assembled!PCB board dimension 135mm x 150mmOperation DC voltage – 3.3V and 5.0VMaximum current @5.0V – 1500mAMaximum current per relay – 5A...10A @ different voltagesLEDs indicators for each electromagnetic relay channelRelays with SPDT switch contacts: Normally Open, Common, Normally ClosedRelay contact resistance 100 milliohms max. ( initial value )Relay insulation resistance 100 MOhm min. (DC 500V)Relay operation time 8 ms maxRelay release time 5ms maxRelay dielectric strength 750 VAC, 50/60Hz between contactRelay dielectric strength 1,500 VAC, 50/60Hz between all elementsRelay expected life Mechanical - 10,000,000 operations min.Relay expected life Electrical - 100,000 operations min. at rated loadWorking temperature range - 25 C ~ + 80 CEach board can be assigned an I2C address between 0x20...0x27 by the DIP switchThe module contains an PCF8575 chipThe logic power supply voltage should match the voltage levels on the I2C bus. The SDA and SCL lines are pulled up to VDD with 5.6k resistors on the relay module.Up to 8 boards can be connected to each I2C bus. 8 x 16 = 128 relays can be controlled via 4 wires!Depending on the relay stock available, the relay manufacturer may differ For stable operation with 3.3V, an I2C logic level shifter should be used

• BUILT AROUND THE PCF8575 CHIP – Uses the onboard PCF8575 16-bit I2C I/O expander to control 16 relay channels while reducing the number of GPIO pins needed from your Raspberry Pi, eps32, esp8266 or other controller.
• 16-CHANNEL I2C RELAY CONTROL – Control up to 16 electromagnetic relays from a single PCF8575-based module, making it a strong fit for Home Assistant, Arduino, and Raspberry Pi projects. Up to 8 boards can be connected to each I2C bus. 8 x 16 = 128 relays can be controlled via 4 wires!
• SPDT RELAYS WITH LED INDICATORS – Each channel includes SPDT contacts with Normally Open, Common, and Normally Closed switching, plus individual LED status indicators for fast visual confirmation
• WORKS WITH 3.3V AND 5V LOGIC – Designed for both 3.3V and 5.0V operation, so it integrates more easily with a wide range of microcontrollers and SBC-based automation systems
• LONG RELAY SERVICE LIFE – Rated for a minimum of 10,000,000 mechanical operations and 100,000 electrical operations at rated load.